To learn more about HiKVision's H.264+ codec you can read: If your DVR is a HiKVision DVR, try enabling, if your firmware supports it, H.264+ which retain the same exact image quality for half the bit-rate required. Main Stream: Set Frame Rate to 6 FPS and set bitrate to 3,072 kbps (3 mbps) or you can set frame rate to 4 FPS and a bitrate of 2048 kbps (2 mbps) add or substract 512 kbps for each frame you decide to add or elimiate to the equation to ensure the same exact picture quality.
CMS DVR 1080P 1080P
Here's what I would do for a 1080P quality:
CMS DVR 1080P FULL
If the recordings on your DVR is set to a bit-rate of 4,96 kbps (4 mbps) then I would recommend an internet connection upload speed for the site at least 8 mbps or greater to compensate for the fact the ISP might not deliver you the full upload speed you pay for and want to have enough head room to ensure that 4 mbps can be uploaded whenever you decide to remote playback a recording - remotely.
CMS DVR 1080P UPGRADE
Solution here: Either lower frame rate along with bitrate proportionally to compensate and get the same image quality for a lower frame rate or upgrade the upload internet speed of the site to a faster speed, say 10 mbps or greater. Live viewing is fine because when you are viewing multiple LIVE cameras you are technically using "Substream" and sub Stream is almost always streamed at a lower resolution and lower bitrate, much lower that your 5 mbps upload speed is a non issue at all (possible substream resolution of 960x480 at a bitrate of 512 kbps, and some DVR's can even have a crappier max substream resolution of CIF which is 320x240 at a much lower bitrate or something in the middle of 704x480 D1, so that's why with remove LIVE viewing through substream, it will almost be alright with almost any consumer level internet speed package, including on a 1.544 mbps D. Remote Playback basically streams the recordings off your DVR's hard drive at the exact quality they were recorded, so if you set your DVR to record at a very high bit-rate, then you will need a much faster upload speed to keep up with the demand.
Remote Playback is never sent through "substream", substream is something that is only used for LIVE remote viewing so that users with a much slower, say mobile 3G connection can be able to fluently and easily be able to watch the cameras in live, but at a much lower resolution and bitrate, a non issue specially if you are watching multiple cameras in your smartphone's screen, say 4, to 8 cameras at once. Plus, some ISP doesn't deliver exactly what is promised so you might not be getting the full 5 mbps upload speed, but probably something like 3.5 to 4.x mbps which can further complicate the problem when attempting to view remote playbacks for high definition footage recorded at a bitrate higher than what your upload speed can accommodate.
CMS DVR 1080P SOFTWARE
Problem here is that when you are connecting remotely, say from your house, the DVR at that location is using the UPSTREAM speed to send the data to the Content Management Software (CMS), and in this case 5 mbps is too little, specially if the recording were done on a very high bitrate. The problem location has an internet connection whose DOWNSTREAM (download) speed is 60 mbps and UPSTREAM (Upload) speed is 5 mbps. The bandwidth is 60Mb/5Mb with a latency of 35ms.
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